You guys already know our G2's issue with LG's official KitKat upgrade. It forces us to use the new bootloader which is loki-killer, that means no custom recovery (CWM, TWRP, Philz), no custom kernel anymore. Right now there's no way to bypass that new bootloader in order to install those stuff. Anyway we still have a workaround to deal with that issue by patching the new kernel so it can work with the old bootloader (which still has loki support) thanks to @JackpotClavin, @Savoca, @xdabbeb

Upgrade to KitKat

For best experience with KitKat, you should follow these steps:

Upgrade to KitKat first (KDZ/TOT/OTA)

Root by ioroot25

Use AutoRec to have recovery

Then you can flash any ROM you like

*D801 must root before taking KitKat OTA

Return To JellyBean

It's real simple when you wanna return to your old ROM or your NAND backup (JB base). All you need is downloading the old JB Baseband and flash it, then your ROM / backup. You can find old JB Baseband here in @autoprime 's thread: http://forum.xda-developers.com/show....php?t=2451426

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